Effect of dietary phosphorus content on milk production and phosphorus excretion in dairy cows

Table 3 Serum Ca and P of cows fed diets differing in P content

Items	Dietary treatments¹			SEM	P ²
Items	LP	MP	HP	SEM	Trt	t	T*t	L	Q
Serum Ca, mmol/L
Prepartum	2.05	2.06	2.06	0.27	0.92	0.28	0.78	0.56	0.57
Postpartum	2.03	2.04	2.00	0.13	0.87	0.32	0.66	0.55	0.61
Serum P, mmol/L
Prepartum	1.21	1.22	1.28	0.04	0.34	0.12	0.84	0.49	0.60
Postpartum	1.25	1.23	1.20	0.07	0.60	0.22	0.74	0.43	0.58

¹LP = low P; MP = medium P; and HP = high P.
²T, effect of treatment; t, effect of time; T*t, treatment by time interaction; L, linear effect; Q, quadratic effect.

ISSN: 2049-1891